"Some of you love SGU, and some of you love to hate it! It would be interesting to see the comments pro and against sorted by gender. In the ratings there is a clear divide. It’s Syfy’s most popular show with young men 18-34 in Live+SD viewing, and young men 18-34 are pretty much the holy grail of advertising since they are oft-cited as the most elusive group to reach with television advertising. But with women 18-49, and 18-34, SGU was the worst-performing of the four scripted Syfy shows that ranked in the top 50."
From TV by the Numbers
Although, evidently the last episode before the hiatus had quite disappointing numbers.